From: Dave Cheney <dave@cheney.net>
Date: Tue, 2 Jun 2015 03:08:59 +0000 (+1000)
Subject: math/big: trim trailing zeros before hex printing
X-Git-Tag: go1.5beta1~379
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d15597e1b21a0324692e8664eb6b2f8158dafd10;p=gostls13.git

math/big: trim trailing zeros before hex printing

m was being resliced as the result of looking for the first
non zero word of the mantissa, however m was not used later
in printing.

Spotted by Gordon Klaus, https://groups.google.com/forum/#!topic/golang-nuts/MdDLbvOjb4o

Change-Id: Ifbebb51ea5e0d86cb8e0422eb184b8634639a733
Reviewed-on: https://go-review.googlesource.com/10604
Reviewed-by: Robert Griesemer <gri@golang.org>
---

diff --git a/src/math/big/ftoa.go b/src/math/big/ftoa.go
index 13bb26f0d2..5c5f2cea46 100644
--- a/src/math/big/ftoa.go
+++ b/src/math/big/ftoa.go
@@ -289,7 +289,7 @@ func (x *Float) fmtP(buf []byte) []byte {
 	m = m[i:]
 
 	buf = append(buf, "0x."...)
-	buf = append(buf, strings.TrimRight(x.mant.hexString(), "0")...)
+	buf = append(buf, strings.TrimRight(m.hexString(), "0")...)
 	buf = append(buf, 'p')
 	if x.exp >= 0 {
 		buf = append(buf, '+')